#include <iostream>

using namespace std;

double count(double light_year)
{
	return light_year * 63240;
}

int main()
{
	cout << "Enter the number of light year: ";
	double light_year;
	cin >> light_year;
	cout << light_year << " light year = " << count(light_year) << " astronomical units" << endl;
	
	return 0;
}